A ball moving eastward with a velocy of 15m/sec bounces off a wall with a velocity of 12m/sec in the opposite direction.If the mass of the ball 200g.Calculate the change in the ball's momentum

m1*V1 - m2V2 = 0.2*15 - 0.2*12 = 0.6.

To calculate the change in the ball's momentum, we need to find the initial momentum and the final momentum of the ball.

The momentum (p) of an object is calculated by multiplying its mass (m) by its velocity (v):
p = m * v

Given:
Mass of the ball (m) = 200g = 0.2kg
Initial velocity (v) = 15m/s
Final velocity (v') = -12m/s (opposite direction)

To get the initial momentum:
p_initial = m * v
p_initial = 0.2kg * 15m/s

To get the final momentum:
p_final = m * v'
p_final = 0.2kg * (-12m/s)

Now we can calculate the change in momentum:
Change in momentum = p_final - p_initial

Substituting the values:
Change in momentum = (0.2kg * -12m/s) - (0.2kg * 15m/s)

Simplifying the equation:
Change in momentum = (-2.4kg m/s) - (3kg m/s)
Change in momentum = -2.4kg m/s - 3kg m/s
Change in momentum = -5.4 kg m/s

Therefore, the change in the ball's momentum is -5.4 kg m/s.